Combating arthropods with 2,2-dimethyl-3-vinyl-cyclopropane carboxylic acid esters of halogenated benzyl alcohols

Abstract

2,2-Dimethyl-3-vinyl-cyclopropane carboxylic acid esters of halogenated benzyl alcohols of the formula <IMAGE> in which each R independently represents F, Cl, Br or CH3 and m and n each represent 0, 1, 2, 3, 4 or 5 subject to the sum of m+n being not more than 5, with the provisos that (i) when each R represents F or Br then m and n cannot both be 0, (ii) when each R represents Cl, then m represents 0, 1, 2, 3 or 4 and n represents 1, 2, 3, 4 or 5, and (iii) when each R represents CH3, then m represents 0 and n represents 5, which possess arthropodicidal properties.

What is claimed is: 
     
       1. A 2,2-dimethyl-3-vinyl-cyclopropane carboxylic acid ester of a halogenated benzyl alcohol of the formula ##STR43## in which each R independently represents F, Cl or Br and m and n each independently represent 0, 1, 2, 3, 4 or 5 subject to the sum of m+n being not more than 5, with the provisos that     (i) when each R represents F or Br then m and n cannot both be O, and   (ii) when each R represents Cl, then m represents 0, 1, 2, 3 or 4 and n represents 1, 2, 3, 4 or 5.   
     
     
       2. An ester according to claim 1, in which m is an integer from 2 to 5 and/or n is an integer from 3 to 5. 
     
     
       3. An ester according to claim 1, in which said ester is 2,2-dimethyl-3-dibromovinyl-cyclopropanecarboxylic acid pentafluorobenzyl ester of the formula ##STR44## 
     
     
       4. An ester according to claim 1, in which said ester is 2,2-dimethyl-3-dibromovinyl-cyclopropanecarboxylic acid pentachlorobenzyl ester of the formula ##STR45## 
     
     
       5. An ester according to claim 1, in which said ester is 2,2-dimethyl-3-dichlorovinyl-cyclopropanecarboxylic acid 2,4,6-trifluoro-3,5-dichlorobenzyl ester of the formula ##STR46## 
     
     
       6. An arthropodicidal composition containing as active ingredient an arthropodicidally effective amount of an ester according to claim 1 in admixture with a diluent. 
     
     
       7. A method of combating arthropods which comprises applying to the arthropods, or to a habitat thereof, an arthropodicidally effective amount of an ester according to claim 1. 
     
     
       8. The method according to claim 7, in which said ester is 2,2-dimethyl-3-dibromovinyl-cyclopropanecarboxylic acid pentafluorobenzyl ester,   2,2-dimethyl-3-dibromovinyl-cyclopropanecarboxylic acid pentachlorobenzyl ester, or   2,2-dimethyl-3-dichlorovinyl-cyclopropanecarboxylic acid 2,4,6-trifluoro-3,5-dichlorobenzyl ester.   
     
     
       9. An ester according to claim 1 in the form of the cis-isomer.